22131030020 has 96 divisors (see below), whose sum is σ = 52003679616. Its totient is φ = 7841254400.

The previous prime is 22131029993. The next prime is 22131030109. The reversal of 22131030020 is 2003013122.

It is a happy number.

It is a super-2 number, since 2×22131030020² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22131029977 and 22131030004.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12383567 + ... + 12385353.

It is an arithmetic number, because the mean of its divisors is an integer number (541704996).

Almost surely, 2^22131030020 is an apocalyptic number.

22131030020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22131030020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26001839808).

22131030020 is an abundant number, since it is smaller than the sum of its proper divisors (29872649596).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22131030020 is a wasteful number, since it uses less digits than its factorization.

22131030020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3221 (or 3219 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 22131030020 its reverse (2003013122), we get a palindrome (24134043142).

The spelling of 22131030020 in words is "twenty-two billion, one hundred thirty-one million, thirty thousand, twenty".